Guest

Cisco WAN Switching Modules

Field Notice: Firmware Version 4.0.19 Causes SRM-3T3 Connections to Fail


June 6, 2000


Products Affected

Product

Comments

AX-FRSM

With Firmware 4.0.19 and later 4.0 revisions, 4.1.00 through 4.1.05 and 5.0.10

AX-CESM

With Firmware 4.0.19 and later 4.0 revisions, 4.1.00 through 4.1.05 and 5.0.10

AX-AUSM

With Firmware 4.0.19 and later 4.0 revisions, 4.1.00 through 4.1.05 and 5.0.10

Problem Description

Connections routed through the SRM-3T3 using Bulk Distribution may stay in a failed state after the T3 line recovers from the failure state.

Background

Following are the conditions that cause this problem to occur:

  • SRM line(s) go into alarm.

  • Channels getting bulk distribution from the SRM lines go into alarm.

  • SRM line alarms clear.

  • Channel alarms persist after SRM line alarm clears.

Problem Symptoms

The symptom was observed by maintenance staff and will appear in the MGX 8220 event log. Use the command dsplog.

07/25/1999-00:00:02 7  clt        4050 Channel in alarm     : LCN #29 
07/25/1999-00:00:02 7  clt        4053 Port in alarm        : port #54 
07/25/1999-00:00:02 7  clt        4050 Channel in alarm     : LCN #24 
07/25/1999-00:00:02 7  clt        4053 Port in alarm        : port #53 
07/25/1999-00:00:03 7  clt        4050 Channel in alarm     : LCN #19 
07/25/1999-00:00:03 7  clt        4053 Port in alarm        : port #64 
07/25/1999-00:00:04 7  clt        4050 Channel in alarm     : LCN #16 
07/25/1999-00:00:04 7  clt        4053 Port in alarm        : port #154 
07/25/1999-00:00:07 7  clt        4050 Channel in alarm     : LCN #18 
07/25/1999-00:00:07 7  clt        4053 Port in alarm        : port #4 
07/25/1999-00:00:07 7  clt        4050 Channel in alarm     : LCN #22 
07/25/1999-00:00:07 7  clt        4053 Port in alarm        : port #153

Workaround/Solution

Workaround:

Issue the switchcc command and then reset the standby ASC.

Solution:

Upgrade the MGX 8220 to firmware version 4.1.06 or later or 5.0.11 or later. You can download these firmware upgrades from the Software Center (WAN Switching) on CCO.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS

Description

CSCdm70346 (registered customers only)

Shelf was unable to recover after lines went into statistical alarm.

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

Receive Email Notification For New Field Notices

Product Alert Tool - Set up a profile to receive email updates about reliability, safety, network security, and end-of-sale issues for the Cisco products you specify.